这个团队是由他为首的。
zhègè tuánduì shì yóu tā wéishǒu de 。
This team is headed by him.
她在会议中为首，提出了许多重要的观点。
tāzài huìyì zhōng wéishǒu ， tíchū le xǔduō zhòngyào de guāndiǎn 。
She was in charge at the meeting and presented many important points.
这家公司由一位经验丰富的经理为首。
zhè jiā gōngsī yóu yīwèi jīngyàn fēngfù de jīnglǐ wéishǒu 。
This company is led by an experienced manager.